866343435172 has 24 divisors (see below), whose sum is σ = 1519978966520. Its totient is φ = 432063970560.

The previous prime is 866343435151. The next prime is 866343435173. The reversal of 866343435172 is 271534343668.

It can be written as a sum of positive squares in 4 ways, for example, as 135294494976 + 731048940196 = 367824^2 + 855014^2 .

It is not an unprimeable number, because it can be changed into a prime (866343435173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17744218 + ... + 17792974.

Almost surely, 2^866343435172 is an apocalyptic number.

It is an amenable number.

866343435172 is a deficient number, since it is larger than the sum of its proper divisors (653635531348).

866343435172 is a wasteful number, since it uses less digits than its factorization.

866343435172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60031 (or 60029 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 52.

The spelling of 866343435172 in words is "eight hundred sixty-six billion, three hundred forty-three million, four hundred thirty-five thousand, one hundred seventy-two".